Metal-working machine



June 22 1926. 1,589,657

H. PELS METAL WORKING MACHINE Filed Nov. 8. 1924 2 Sheets-Sheet 1 June 22 1926. 1,589,657

H. PELS METAL WORKING MACHINE Filed Nov. 8. 1924 2 Sheets-Sheet 2 Patented June 22, 15126.

UNITED raiser OFFICE.

METAL-WORKING MACHINE.

Application filed November 8, 1924, Serial No. 748,788, and in Germany September 13, 1824.

This invention relates to a metal working machine for cutting and perforating metal,

particularly H girders, being adapted, when the knife is removed and a suitable die is 5 inserted, to perforate, as desired, the web and the flanges of such a girder or other ele-.

ments, or, if the knife be not removed, to out such a girder or other element to the desired length, its action in such cutting oper- 0 ation being similar to a joist shearing machine, the wedge-shaped knife executing first a vertical downward movement to cut through the web of the horizontal iron, whereupon the wedge-shaped knife, controlled by links, executes an are shaped out in downward direction to cut for instance the right flange of the horizontal. H girder. The wedge-shaped knife then moves back in the same arc-shaped path to execute a straight movement in upward direction whereupon it descends again to be moved in executing an arc-shaped path towards the left side of the iron to cut the left flange of the H girder. The knife then goes back in the arc-shaped path upward to execute finally a vertical upward movement. The condition therefore is that the eccentric which acts upon the wedge-shaped knife, executes two downward strokes in cutting off a length of the girder.

This manner of cutting presents essential advantages over the manner of cutting of the joist shearing machines which at one revolution of the driving eccentric executes a double loop shaped out, these advantages consisting in that the play between the lower edge of the upper knife and the upper edge of the lower knife may be made so great that it is easy to push the iron through which has not been the casein the joist shearing machines of known type having a closed month.

The path of travel of the upper knife differs from the path of the upper knife in the joint shearing machines of known type, for instance, such as shown and described in my United States Letters Patent No.

1,134,903 granted April 6, 1915, in so far 6 as the upper knife descends first in vertical direction and then executes either the right 7 or the left movement in an arcuate path. As the vertical movement of the upper knife can be selected independently of the arcshaped movement it is possible to obtain any desired play between the lower edge of the upper knife and the upper edge of the lower knife. As further by the machine according to the present invention at every revolution of the shaft of the eccentric only one half of the iron is cut through, the driving elements of the machine, such as eccentrics, wheels and the like, may be built much lighter than in the commonly used machines in which at one revolution of the shaft of the eccentric the iron is cut through by two loop shaped movements of the knife. Besides the advantage of the greater play between lower knife and upper knife economical advantages are obtained, as the machine is of lighter weight and consequently more easily transported.

The machine has a stationary pair of lower knives and lateral pairs of knives adjustable in lateral directions. When the machine is to be used for perforating the flanges of girder or other element the pairs of lateral knives are pulled back and a die holder is inserted, a punch being substituted for the knife in the holder for the upper knife. v I

In this case the H girder is sus ended on the die holder so that its web stan s vertical, the flange to be perforated resting upon the die holder. lVhen the web of the H girder or of other profile irons is to be perforated the web of the iron is placed horizontally on the die holder. The machine unites therefore a joist shearing machine and a punching machine in oneframe so that it is especiall adapted for work on cut ant perforated;

A machine of this type is shown, by way of example, in the accompanying drawings, in which Fig. 1 shows the machine in elevation. Fig. 2 is a vertical section on line AB and Fig. 3 is a horizontal section on line CD of Fig. 1. V i

4 and 5 illustrate two other forms girders to be of construction of the machines designed to act as shearing machines.

Figs. 6 and 8 show the machine with the die holder and the punch for punching holes in the flanges and web of H girders and other elements.

In the machine shown in Figs. 1 to 3 the driving eccentric 1 acts with its cam 2 on the upper knife holder 8 in which the upper knife 4; is mounted. At either side of the upper knife holder 3 the links 5 are pivotally mounted on said holder. The links 5 en gage alternately against the abutments 6 which are alternately brou ht into the working position from a cam iskl 7 through the intermediary of a lever 8, rod 9 and lever 10-. The links 5 have studs 11 which engage with slots 12 in the walls 13 of the machine frame. During the first revolution of the driving eccentric 1 the upper knife holder 3 is first moved downward in vertical direction until, at the rotation of the driving eccentric 1 in the direction of the arrow the left link 5 acts upon the abutment 6. The upper knife holder 3 is then pressed to the right by the left lin 5 and executes, at the continuous rotation of the driving eccentric 1, an arc-shaped movement in a curve 11,- III and cuts through the right side of the H girder. The upper knife holder 3 ascends again and the cam disk 7 releases the lever 8, a spring 14: acting upon the lever 8 making this lever 8 with rod 9 and the lever 10 oscillate so that the right abutment is brought into the same position with regard to the right link 5 as the left abutment (i occcupie'd with regard to the left link 5 immediately prior to the start of the first revolution of said eccentric l, completing the first cycle of the operation.

Now begins the second revolution of the driving eccentric 1. At this second revolution the upper knife holder 3 with the upper knife 4 descends again in Vertical direction until the right link 5 comes in contact with the abutment 6 whereby the upper knife holder 3 is pushed to the left. The upper knife executes thus an arc-shaped movement along a curve IVV and cuts the left half of the H girder through. During the following ascending of the upper knife holder 3 the cam disk 7 brings, through the intermediaryof lever 8 rod 9 and lever 10, the right abutment 6 again into the position shown in Fig. 1, the abutment 6 at the left side being brought again into the working position with regard to the left link 5 through the intermediary of the corresponding rod 9 and lever 10 thus completing the second and linal cycle of the shearing or cutting operation, the parts being left in position for the repetition of the first cycle of the operation as above described. The cam disk 7 must execute only one revolution for every two revolutions of the driving eccentric 1, this being effected by corresponding toothed gear transmission. The throwing in and out of the clutch coupling for the shaft of the driving eccentric 1 is arranged in such a manner that the automatic release thereof takes place after two revolutions of the shaft of the eccentric. The upper knife holder 3 is held at its upper end by a two-armed rocking beam 16 pivotally mounted on a stud 15 and carrying at its free arm a counter weight 17.

The lateral pairs of knives 18' and the pair of lower knives 19 may be of any convenient construction. The vertical stroke VI, VII of the upper knife 1 is increased when the play between the links 5 and the abutments 6 increases, the eccentricity of the driving eccentric 1 having to be increased also.

In the form of construction shown in Fig. 4: guide rollers 20 are substituted for the two links 5. These guide rollers are mounted on arms 21 and run on corresponding surfaces 22 of. the upper knife holder 3. In this case also the upper knife holder 3 is first moved downward during the rotation of the driving eccentric 1 by the cam 2 until the left roller 20 bears on the left guide surface 22 and pushes the upper knife holder to the right.

During the second working phase of the upper knife holder 3 the right roller 20 which has previously, as above described, been broughtinto working position through the intermediary of the rigging 8, 9, 10, engages the right guide surface 22 of the upper knife holder 3 and presses the same during the second part of its descending movement to the left so that the upper knife is moved along the curve-IV, V.

In the machine shown in Fig. 5 the cam 2 presses against an abutment 23, which is movable and adapted to be drawn out so that the upper knife holder 8 is pulled upward by the action of the counter weight 17. At this moment the H irder can be easily inserted into the mout i of the machine. v After the insertion of the H girder into the cutting osition the upper knife holder 3 is pulled hack into the working position so that the abutment 23 can be returned to its initial position and the machine is again ready for work.

In this machine the links 5 are guided by their upper studs 37 in longitudinal slots 38 of the upper knife holder 8.

In order that this machine may be used also for punching holes into the flanges and web of the H girder the links 5 are uncoupled from the upper knife holder so that the upper knife executes only a vertical movement. For the upper knife 1 a holder 24 for the punch 25 is substituted in the upper knife holder 3. If the flanges of the H girder are to be perforated, as shown in Figs. 6 and 7, a support 27 for a die is inserted into the mouth 26 of the machine, the pairs of lateral knives 18 having first been removed or screwed back, the U-shaped frame 28 of this support embracing one pair of the lateral knives 18, its lower flange 29 being fixed by means of screws on the base plate 30 of the machine, and its upper surface serving to support the die holder 31 which is securely held in the support 27 by an eye screw 32 and which further carries a guide bolt 33, sunk in a convenient manner into the support 27. The die holder 31 carries the die 34.

If by means of the punch 25 the web of the H girder is to be perforated a die holder is used which consists of a bracket 35 in the shape of a column and is connected in any convenient manner with the base plate 30 of the machine and carries the die 34:. This bracket has a channel 36 which serves as passage for the material punched out of the girder or other element.

I claim 1. A metal working machine for workingprofile metal comprising a knife holder, and an eccentric for engaging said holder for re ciprocating the same in a vertical plane, the axis about which said eccentric rotates being substantially in the same transverse vertical plane as the vertical central line of said holder, in combination with a pair of links, one at either side, and abutments respectively cooperating with said links, and means operative at will for alternately positioning said abutments to limit the movement of said links, whereby said links alternately act upon said knife holder to translate the lower part of the vertically downward movement of the lower portion of, said holder into an arcuate vertically downward movement.

2. A metal working machine comprising a tool holder, and an eccentric for engaging said holder for reciprocating the same in a vertical plane, the axis about which said, eccentric rotates being substantially in thesame transverse vertical plane as the vertical central line of said holder, in combi nation with a link adapted to cooperate with said holder, and means cooperating with said link, said link and means serving to cause the lower part of the vertically downward stroke of the lower portion of said holder to be translated into an arcuate vertically downward movement at certain periods of the operative cycles of the ma-' said holder, abutments respectively cooperating with. said links, and means operative at will foralternately positioning said abutn'ients, to limit the movement of said links, whereby said links alternately act upon said knife holder to translate the lower part of the vertical downward movement of the lower portion of said holder into an arcuate vertically downward movement, the axis about which said eccentric rotates being located above, and substantially equi distant from, said abutments.

l. A metal working machine comprising a tool holder, and an eccentric for engaging said holder for reciprocating the same in a vertical plane, in combination with a pair of links detachably connected, one at either side, to said holder, abutments respectively cooperating with said links, and means operative at will for alternately positioning said abutments to limit the movement of said links, whereby said links alternately act upon said tool holder to translate the lower part of the vertical movement of the lower portion of said holder into an arcuate vertically downward movement, the axis about which said eccentric rotates being located above, and substantially equi-distant from, said abutments.

5. A metal working machine comprising a tool holder, and an eccentric for engaging said holder for reciprocating the same in a vertical plane, in combination with a pair of links, one at either side of said holder, abutments respectively cooperating with said links, means governed in accordance with the rotation of said eccentric and operative at will for alternately positioning said abutments to limit the movement of said links, whereby said links will alternately act upon said tool holder to translate the lower part of the vertically downward movement of the lower portion of said holder into an arcuate vertically downward movement, and whereby said holder in its entirety will execute a truly straight vertical ascending movement and a truly straight vertical descending movement between each two arcuate movements of its lower portion, the axis about which said eccentric rotates being located above, and substantially equi-distant from, said abutments.

6. A metal working machine comprising a frame, a tool holder mounted in said frame and adapted to reciprocate in a vertical plane therein, holder oscillating means adapted to act on said holder to cause a portion thereof to move alternately in opposed lateral and vertically downward opposed arcs at definite periods of the opera tion of the machine, driving means acting on said holder in a different vertical plane than said holder oscillating means and substantially in the line of the vertical thrust of said holder, and control means governed by said driving means for controlling the holder oscillating means whereby said holder will reciprocate in a vertical straight line upward for a part of its stroke and downward for a part of its'stroke between each two said lateral movements of a portion thereof.

In testimony whereof, I have signed my HENRY PELS. 

